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1. Corrigendum: 'Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis' [Phys. Lett. B 790 (2019) 458–465]

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Published
2023
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2. Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Abstract

73Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system. Keywords: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF

Published
2019
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3. Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

Author

A. Mazzone, S. Cristallo, O. Aberle, G. Alaerts, V. Alcayne, S. Amaducci, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, V. Bécares, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A.S. Brown, M. Busso, M. Caamaño, L. Caballero, M. Calviani, F. Calviño, D. Cano-Ott, A. Casanovas, D.M. Castelluccio, F. Cerutti, Y.H. Chen, E. Chiaveri, G. Clai, N. Colonna, G.P. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domíngez, A. Ferrari, I. Ferro-Gonçalves, P. Finocchiaro, V. Furman, R. Garg, A. Gawlik, S. Gilardoni, T. Glodariu, K. Göbel, E. González-Romero, C. Guerrero, F. Gunsing, S. Heinitz, J. Heyse, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, A. Kimura, N. Kivel, M. Kokkoris, Y. Kopatch, S. Kopecky, M. Krtička, D. Kurtulgil, I. Ladarescu, C. Lederer-Woods, J. Lerendegui-Marco, S. Lo Meo, S.-J. Lonsdale, D. Macina, A. Manna, T. Martínez, A. Masi, C. Massimi, P.F. Mastinu, M. Mastromarco, F. Matteucci, E. Maugeri, E. Mendoza, A. Mengoni, V. Michalopoulou, P.M. Milazzo, F. Mingrone, R. Mucciola, A. Musumarra, A. Negret, R. Nolte, F. Ogállar, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, L. Piersanti, I. Porras, J. Praena, J.M. Quesada, D. Radeck, D. Ramos Doval, R. Reifarth, D. Rochman, C. Rubbia, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, A.G. Smith, N. Sosnin, A. Stamatopoulos, G. Tagliente, J.L. Tain, Z. Talip, A.E. Tarifeño-Saldivia, L. Tassan-Got, P. Torres-Sánchez, A. Tsinganis, J. Ulrich, S. Urlass, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, D. Vescovi, V. Vlachoudis, R. Vlastou, A. Wallner, P.J. Woods, R. Wynants, T.J. Wright, and P. Žugec

Subjects
Physics, QC1-999
Abstract

The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT=30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models. Keywords: s process, 154Gd, Neutron time of flight, n_TOF

Published
2020
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4. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

Author

C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécares, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, S. Bisterzo, D. Bosnar, M. Brugger, M. Calviani, F. Calviño, D. Cano-Ott, C. Carrapiço, D.M. Castelluccio, F. Cerutti, E. Chiaveri, L. Cosentino, M. Chin, G. Clai, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, S. Cristallo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, C. Eleftheriadis, A. Ferrari, P. Finocchiaro, K. Fraval, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, A. Hernández-Prieto, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, S. Kopecky, M. Krtička, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, S. Lo Meo, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, P.F. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, A. Musumarra, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, L. Piersanti, A. Plompen, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M.S. Robles, C. Rubbia, M. Sabaté-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J.L. Tain, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, I. Van Rijs, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiß, R. Wynants, T. Wright, and P. Žugec

Subjects
s Process, α+22Ne, Neutron spectroscopy, Physics, QC1-999
Abstract

This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.

Published
2017
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5. Recoil Proton Telescopes and Parallel Plate Avalanche Counters for the $^{235}$U(n,f) cross section measurement relative to H(n,n)H between 10 and 450 MeV neutron energy

Author

A. Manna, E. Pirovano, O. Aberle, S. Amaducci, M. Barbagallo, D.M. Castelluccio, N. Colonna, P. Console Camprini, L. Cosentino, M. Dietz, Q. Ducasse, P. Finocchiaro, C. Le Naour, S. Lo Meo, M. Mastromarco, C. Massimi, A. Mengoni, P.M. Milazzo, F. Mingrone, R. Nolte, M. Piscopo, D. Radeck, M. Spelta, L. Tassan-Got, N. Terranova, G. Vannini, and HEP, INSPIRE

Subjects
Physics - Instrumentation and Detectors, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], FOS: Physical sciences, Nuclear Physics - Experiment, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Detectors and Experimental Techniques, nucl-ex, Instrumentation, Nuclear Experiment, physics.ins-det, Mathematical Physics
Abstract

With the aim of measuring the $^{235}$U(n,f) cross section at the n_TOF facility at CERNover a wide neutron energy range, a detection system consisting of two fission detectors and threedetectors for neutron flux determination was realized. The neutron flux detectors are RecoilProton Telescopes (RPTs), based on scintillators and solid state detectors, conceived to detectrecoil protons from the neutron-proton elastic scattering reaction. This system, along with afission chamber and an array of parallel plate avalanche counters for fission event detection, wasinstalled for the measurement at the n_TOF facility in 2018, at CERN.An overview of the performances of two RPTs — especially developed for this measurement — and of theparallel plate avalanche counters are described in this article. In particular, the characterizationin terms of detection efficiency by Monte Carlo simulations and response to neutron beam, the studyof the background, dead time correction and characterization of the samples, are reported. Theresults of the present investigation show that the performances of these detectors are suitable foraccurate measurements of fission reaction cross sections in the range from 10 to 450 MeV. With the aim of measuring the $^{235}$U(n,f) cross section at the n_TOF facility at CERN over a wide neutron energy range, a detection system consisting of two fission detectors and three detectors for neutron flux determination was realized. The neutron flux detectors are Recoil Proton Telescopes (RPT), based on scintillators and solid state detectors, conceived to detect recoil protons from the neutron-proton elastic scattering reaction. This system, along with a fission chamber and an array of parallel plate avalanche counters for fission event detection, was installed for the measurement at the n_TOF facility in 2018, at CERN. An overview of the performances of two RPTs - especially developed for this measurement - and of the parallel plate avalanche counters are described in this article. In particular, the characterization in terms of detection efficiency by Monte Carlo simulations and response to neutron beam, the study of the background, dead time correction and characterization of the samples, are reported. The results of the present investigation show that the performances of these detectors are suitable for accurate measurements of fission reaction cross sections in the range from 10 to 450~MeV.

Published
2022

6. Overview of the dissemination of n_TOF experimental data and resonance parameters

Author

E. Dupont, N. Otuka, D. Rochman, G. Nogèure, O. Aberle, V. Alcayne, S. Altieri, S. Amaducci, J. Andrzejewski, V. Babiano-Suarez, M. Bacak, J. Balibrea, C. Beltrami, S. Bennett, A.P. Bernardes, E. Berthoumieux, R. Beyer, M. Boromiza, D. Bosnar, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, F. Cerutti, G. Cescutti, E. Chiaveri, P. Colombetti, N. Colonna, P. Console Camprini, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, S. Cristallo, S. Dellmann, M. Di Castro, S. Di Maria, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, I. Durán, Z. Eleme, S. Fargier, B. Fernández, B. Fernández-Domínguez, P. Finocchiaro, S. Fiore, V. Furman, F. García-Infantes, A. Gawlik-Ramięga, G. Gervino, S. Gilardoni, E. González-Romero, C. Guerrero, F. Gunsing, C. Gustavino, J. Heyse, W. Hillman, G.D. Jenkins, E. Jericha, A. Junghans, Y. Kadi, K. Kaperoni, G. Kaur, A. Kimura, I. Knapová, M. Kokkoris, Y. Kopatch, M. Krtička, N. Kyritsis, I. Ladarescu, C. Lederer-Woods, J. Lerendegui-Marco, G. Lerner, A. Manna, T. Martínez, A. Masi, C. Massimi, P. Mastinu, M. Mastromarco, E.A. Maugeri, A. Mazzone, E. Mendoza, A. Mengoni, V. Michalopoulou, P.M. Milazzo, R. Mucciola, F. Murtas, E. Musacchio-Gonzalez, A. Musumarra, A. Negret, A. Pérez de Rada, P. Pérez-Maroto, N. Patronis, J.A. Pavón-Rodrgíuez, M.G. Pellegriti, J. Perkowski, C. Petrone, E. Pirovano, J. Plaza, S. Pomp, I. Porras, J. Praena, J.M. Quesada, R. Reifarth, Y. Romanets, C. Rubbia, A. Sánchez-Caballero, M. Sabaté-Gilarte, P. Schillebeeckx, D. Schumann, A. Sekhar, A.G. Smith, N.V. Sosnin, M.E. Stamati, A. Sturniolo, G. Tagliente, A. Tarifeño-Saldivia, D. Taríro, P. Torres-Sánchez, E. Vagena, S. Valenta, V. Variale, P. Vaz, G. Vecchio, D. Vescovi, V. Vlachoudis, R. Vlastou, A. Wallner, P.J. Woods, T. Wright, R. Zarrella, and P. Žugec

Subjects
General Medicine
Abstract

The n_TOF neutron time-of-flight facility at CERN is used for nuclear data measurements. The n_TOF Collaboration works closely with the Nuclear Reaction Data Centres (NRDC) network to disseminate the experimental data through the international EXFOR library. In addition, the Collaboration helps integrate the results in the evaluated library projects. The present contribution describes the dissemination status of n_TOF results, their impact on evaluated libraries and ongoing efforts to provide n_TOF resonance parameters in ENDF-6 format for further use by evaluation projects.

Published
2023

7. Preparation and characterization of 33S samples for 33S(n,α)30Si cross-section measurements at the n_TOF facility at CERN

Author

J. Praena, F.J. Ferrer, W. Vollenberg, M. Sabaté-Gilarte, B. Fernández, J. García-López, I. Porras, J.M. Quesada, S. Altstadt, J. Andrzejewski, L. Audouin, V. Bécares, M. Barbagallo, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, F. Calviño, M. Calviani, D. Cano-Ott, C. Carrapiço, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, I. Durán, C. Eleftheriadis, A. Ferrari, K. Fraval, V. Furman, K. Göbel, M.B. Gómez-Hornillos, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, C. Guerrero, F. Gunsing, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, T. Katabuchi, V. Ketlerov, V. Khryachkov, N. Kivel, P. Koehler, M. Kokkoris, J. Kroll, M. Krtička, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, J. Lerendegui-Marco, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, C. Paradela, A. Pavlik, J. Perkowski, A.J.M. Plompen, T. Rauscher, R. Reifarth, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, and P. Žugec

Subjects
Physics, Nuclear and High Energy Physics, Thin layers, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, Rutherford backscattering spectrometry, 7. Clean energy, 01 natural sciences, Copper, Kapton, Chromium, chemistry, 0103 physical sciences, Sublimation (phase transition), Neutron, 010306 general physics, Instrumentation, Titanium
Abstract

Thin 33S samples for the study of the 33S(n, α)30Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. The samples have shown an excellent adherence with no mass loss after few years and no sublimation in vacuum at room temperature. The determination of the mass thickness of 33S has been performed by means of Rutherford backscattering spectrometry. The samples have been successfully tested under neutron irradiation.

Published
2018

8. Polyimide-based scintillating thin films

Author

Gianluigi Maggioni, F. Gramegna, P.M. Milazzo, S. Carturan, Alberto Quaranta, G. Della Mea, U. Pieri, and U. Abbondanno

Subjects
Nuclear and High Energy Physics, Scintillation, Materials science, Dopant, Analytical chemistry, Alpha particle, Scintillator, chemistry.chemical_compound, Nuclear Energy and Engineering, chemistry, Rhodamine B, Electrical and Electronic Engineering, Thin film, Curing (chemistry), Polyimide
Abstract

The production procedure and the scintillation characteristics of thin polyimide films containing rhodamine B are reported. Fluorinated polyimide has been chosen as host matrix for its well known radiation hardness, in order to improve the lifetime of detector systems based on plastic thin film scintillators, 6FDA (4,4'-hertafluoroisopropylidene diphthalic anhydride) and DAB (diaminobenzophenone) have been used as polyimide precursor monomers. The samples have been cured in air at temperatures ranging from 80/spl deg/C up to 250/spl deg/C. The scintillation spectra have been collected by irradiating the samples with a 5.478 MeV alpha particle source and their shape and intensity have been investigated as a function of dopant concentration and curing temperature.

Published
2001

9. Status and outlook of the neutron time-of-flight facility n_TOF at CERN

Author

F. Käppeler, C. Lampoudis, L. Marques, A. J. M. Plompen, H. Frais-Koelbl, A. Pavlik, I. Goncalves, F. Voss, E. Kossionides, I. Duran, P. Cennini, P.A. Assimakopoulos, S. Walter, C. T. Papadopoulos, A. Herrera-Martinez, Marco T. Pigni, N. Patronis, W. Furman, R. Vlastou, Thomas Rauscher, G. Vannini, E. Berthoumieux, P.M. Milazzo, P. Baumann, Nicola Colonna, S. Lukic, K. Fujii, M. Oshima, M. Dahlfors, D. Cano-Ott, F. Gunsing, P. Vaz, Carlo Rubbia, D. Karadimos, R. Ferreira-Marques, I. Dillman, Alberto Ventura, V. Ketlerov, I. Savvidis, V. Chepel, T. Martínez, V. Vlachoudis, R. Haight, D. Villamarin, G. Tagliente, C. Stephan, C. Pretel, P. E. Koehler, Cristian Massimi, J. Pancin, L. Sarchiapone, L. Perrot, I. Lopes, J. Cox, S. Marrone, C. A. Papachristodoulou, P. Mastinu, Manuel Lozano, E. Chiaveri, F. Neves, G. Cortes, H. Wendler, L. Ferrant, V.Y. Konovalov, H. Álvarez, M. Rosetti, J. Andrzejewski, G. Rudolf, K. Wisshak, Carlos Guerrero, F. Bečvář, E. González-Romero, R. Reifarth, R. Terlizzi, J. M. Quesada, A. Couture, M.C. Vincente, Heinz Oberhummer, E. Griesmayer, J. Marganiec, R. Capote, L. Tassan-Got, L. Tavora, M. Mosconi, P. Rullhusen, S. David, A. Lindote, L. Audouin, A. Poch, B. Haas, P. Pavlopoulos, C. Eleftheriadis, M. Kerveno, Yacine Kadi, U. Abbondanno, W. Dridi, Alberto Mengoni, R. Plag, Alfredo Ferrari, H. Leeb, S. G. Isaev, A. Carrillo de Albornoz, C. Paradela, A. Plukis, M. Krtička, F. Calviño, E. Jericha, S. Andriamonje, J.L. Tain, M. Heil, F. Gramegna, M. Igashira, M. Wiescher, C. Domingo-Pardo, G. Aerts, S. O'Brien, A. Goverdovski, C. Moreau, F. Alvarez-Velarde, Gerald Badurek, R. Dolfini, D. Karamanis, J. Salgado, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, F. Gunsing, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, D. Cano-Ott, R. Capote, A. Carrillo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillman, R. Dolfini, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, A. Ferrari, R. Ferreira-Marque, H. Frais-Koelbl, K. Fujii, W. Furman, I. Goncalve, E. González-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionide, M. Krtička, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, L. Marque, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M.T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pole Universitaire Leonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), nTOF, and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, SPALLATION, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, NEUTRONS, Neutron time-of-flight scattering, 29.25, 28.20.−v, 24.30.−v, 98.80, Neutron flux, 0103 physical sciences, CERN, Neutron cross section, Neutron detection, Neutron, n_TOF, 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Time-of-flight, Neutron temperature, Neutron capture, N_TOF, Neutron source, Física nuclear, TIME OF FLIGHT, Spallation
Abstract

5 pages, 2 figures.-- PACS nrs.: 29.25; 28.20.−v; 24.30.−v; 98.80.-- ISI Article Identifier: 000248784100221, Printed version published Aug 2007.-- Issue title: The Application of Accelerators in Research and Industry - Proceedings of the Nineteenth International Conference on The Application of Accelerators in Research and Industry (Fort Worth, TX, Aug 20-25, 2006)., The neutron time-of-flight facility n_TOF at CERN, fully operational since 2002, combines a high instantaneous neutron flux with high energy resolution. The wide energy range and the high neutron flux per time-of-flight burst result in a much enhanced signal to background ratio for neutron capture of radioactive isotopes and makes this facility well suited for the measurement of high quality neutron-induced reaction cross-sections., Neutrons are created by spallation reactions induced by a pulsed 20 GeV/c proton beam impinging on a lead target. A 5 cm water slab surrounding the lead target serves as a coolant and at the same time as a moderator of the spallation neutron spectrum, providing a wide energy spectrum from 0.1 eV to about 250 MeV., By the end of 2005, a first phase of data taking has been successfully terminated. Fission and capture experiments have been performed on a variety of isotopes of interest for nuclear astrophysics, advanced nuclear technologies and for basic nuclear physics., The instrumentation developed for this facility consists of parallel plate avalanche counter and fission ionization chamber detectors for the fission experiments and of low mass C6D6 detectors and a 4 pi BaF2 total absorption calorimeter for capture experiments. A new data acquisition system, based on sampling of the detector signals, has been developed to cope with the high count rates and to minimize the effective dead time to only a few tens of nanosecond., A second phase of data taking is planned to start in 2007, after an upgrade of the spallation target. On the longer term, the construction of a flight path at 20 in resulting in an increased neutron flux of about a factor of 100 opens new possibilities.

Published
2007
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10. Optimizing performances of CsI(Tl) crystals with a photodiode readout

Author

L. Travaglini, F. Tonetto, P.M. Milazzo, Massimo Chiari, and U. Abbondanno

Subjects
Physics, Coupling, Nuclear and High Energy Physics, business.industry, Detector, Resolution (electron density), Functional relation, Photodiode, law.invention, Crystal, Optics, law, business, Instrumentation, Energy (signal processing), Pulse height
Abstract

Tests are described concerning the performances of CsI(Tl) crystals. Particular care was dedicated to the study of the light production and collection of the crystals, that appear to be significantly a⁄ected both by the choice of the wrapping materials and by the details of the binding technique. A functional relation between the light pulse height and the coupling of the crystal#photodiode system was deduced. Finally, the influence of this coupling on the energy resolution of the detector is discussed. ( 1999 Elsevier Science B.V. All rights reserved.

Published
1999

11. GARFIELD:a general array for fragment identification and for emitted light particles in dissipative collisions 2004 IEEE nuclear science symposium, medical imaging conference, and workshop of room-temperature semiconductor detectors

Author

F. Gramegna, A. Moroni, G. Casini, M. Bruno, U. Abbondanno, R. Bassini, S. Barlini, A. Boiano, C. Boiano, S. Brambilla, R. Cavaletti, M. Chiari, A. Cortesi, M. D'Agostino, P. Del Carmine, M. Falsiroli, E. Geraci, M. Giacchini, A. Giussani, V.L. Kravchuk, A.L. Lanchais, M. Malatesta, G.V. Margagliotti, P.F. Mastinu, P.M. Milazzo, A. Nannini, A. Ordine, G. Tobia, F. Tonetto, L. Travaglini, G. Vannini, and L. Vannucci

Subjects
Nuclear physics, Physics, Range (particle radiation), Photon, Physics::Instrumentation and Detectors, Ionization, Detector, Spark chamber, Particle detector, Charged particle, Semiconductor detector
Abstract

GARFIELD, an apparatus designed to study complex nuclear events produced in the medium-low energy range (5-20 A MeV) heavy ion induced reactions, is presented. Its main components are two newly conceived drift chambers, based on the ∆E-E technique, for fragment and light charged particle identification (θ=30°-150°). The ∆E signals are delivered by 180 micro-strip detectors that amplify the primary ionization produced along the track left by the particle in the gas. The residual energy signals are given by 180 CsI(Tl) crystals. Details both on the main characteristics of the single parts and of the

Published
2005

12. Measurement of the neutron induced fission cross section on transuranic (TRU) elements at the n_TOF facility at CERN

Author

P. F. Mastinu, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, I. Goncalves, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krticka, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Ricardo Alarcon, Philip L. Cole, Chaden Djalali, Fernando Umeres, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pole Universitaire Leonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), R. Alarcon, Ph.L. Cole, Ch. Djalali, F. Umeres, nTOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Large Hadron Collider, Isotope, Fission, 020206 networking & telecommunications, ionisation chambers, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Nuclear physics, fission reactor design, Uranium-238, nuclear reactions and scattering, Uranium-233, Ionization chamber, 25.85.Ec, 25.40.-h, 28.20.-v, 29.40.Cs, 28.41.Kw, 0202 electrical engineering, electronic engineering, information engineering, Uranium-235, radioactive waste, nuclear power, 020201 artificial intelligence & image processing, Neutron, neutron-nucleus reactions
Abstract

International audience; During the 2004 campaign, the n_TOF collaboration measured neutron fission cross sections for ^{233}U, ^{241,243}Am, ^{245}Cm, as well as the fission standards ^{235,238}U, using a sealed Fission Ionization Chamber (FIC). The setup included a total of 16 targets and 18 electrodes mounted together in a 50-cm length chamber, allowing the measurements of all isotopes at the same time, thus in the same experimental conditions. A brief description of the facility and of the detector setup will be presented followed by the preliminary results of the analysis of ^{235}U, ^{233}U, and ^{245}Cm from thermal energies up to some tenths of MeV.

13. Size and asymmetry of the reaction entrance channel: Influence on the probability of neck production

Author

G. Vannini, P. F. Mastinu, R. Alba, R. Coniglione, G. Bellia, Domenico Santonocito, A. Moroni, Giacomo Vito Margagliotti, C. Maiolino, P. M. Milazzo, E. Migneco, A. Del Zoppo, Paolo Finocchiaro, Paolo Piattelli, C. Agodi, I. Iori, Rinaldo Rui, Paolo Sapienza, F. Gramegna, Nicola Colonna, P. M., Milazzo, G., Vannini, C., Agodi, R., Alba, G., Bellia, N., Colonna, R., Coniglione, A., DEL ZOPPO, P., Finocchiaro, F., Gramegna, I., Iori, C., Maiolino, Margagliotti, Giacomo, P. F., Mastinu, E., Migneco, A., Moroni, P., Piattelli, Rui, Rinaldo, D., Santonocito, P., Sapienza, P.M. Milazzo, G. Vannini, C. Agodi, R. Alba, G. Bellia, N. Colonna, R. Coniglione, A. Del Zoppo, P. Finocchiaro, F. Gramegna, I. Iori, C. Maiolino, G.V. Margagliotti, P.F. Mastinu, E. Migneco, A. Moroni, P. Piattelli, R. Rui, D. Santonocito, and P. Sapienza.

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, media_common.quotation_subject, Nuclear Theory, FOS: Physical sciences, Charge density, Asymmetry, medicine.anatomical_structure, medicine, Dissipative system, Neutron, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Nucleon, Nucleus, Excitation, media_common
Abstract

The results of experiments performed to investigate the Ni+Al, Ni+Ni, Ni+Ag reactions at 30 MeV/nucleon are presented. From the study of dissipative midperipheral collisions, it has been possible to detect events in which Intermediate Mass Fragments (IMF) production takes place. The decay of a quasi-projectile has been identified; its excitation energy leads to a multifragmentation totally described in terms of a statistical disassembly of a thermalized system (T$\simeq$4 MeV, E$^*\simeq$4 MeV/nucleon). Moreover, for the systems Ni+Ni, Ni+Ag, in the same nuclear reaction, a source with velocity intermediate between that of the quasi-projectile and that of the quasi-target, emitting IMF, is observed. The fragments produced by this source are more neutron rich than the average matter of the overall system, and have a charge distribution different, with respect to those statistically emitted from the quasi-projectile. The above features can be considered as a signature of the dynamical origin of the midvelocity emission. The results of this analysis show that IMF can be produced via different mechanisms simultaneously present within the same collision. Moreover, once fixed the characteristics of the quasi-projectile in the three considered reactions (in size, excitation energy and temperature), one observes that the probability of a partner IMF production via dynamical mechanism has a threshold (not present in the Ni+Al case) and increases with the size of the target nucleus., 16 pages, 7 figures, accepted for publication on Nuclear Physics A

Published
2005

14. A signal of spinodal decomposition around Fermi energy

Author

Domenico Santonocito, Paolo Piattelli, G. Vannini, M. Bruno, R. Alba, Maria Colonna, K. Loukachine, I. Iori, G. Bellia, Giacomo Vito Margagliotti, E. Migneco, R. Coniglione, P. M. Milazzo, Paolo Finocchiaro, P. F. Mastinu, F. Gramegna, C. Agodi, C. Maiolino, Rinaldo Rui, M. L. Fiandri, A. Moroni, M. D'Agostino, P. Sapienza, Nicola Colonna, A. Del Zoppo, R., Alba, C., Agodi, C., Maiolino, A., Delzoppo, M., Colonna, G., Bellia, R., Coniglione, P., Finocchiaro, K., Loukachine, E., Migneco, P., Piattelli, D., Santonocito, P., Sapienza, M., Bruno, M., Dagostino, M. L., Fiandri, G., Vannini, N., Colonna, F., Gramegna, P. F., Mastinu, I., Iori, A., Moroni, Margagliotti, Giacomo, P. M., Milazzo, Rui, Rinaldo, R. Alba, C. Agodi, C. Maiolino, A. Del Zoppo, M. Colonna, G. Bellia, R. Coniglione, P. Finocchiaro, K. Loukachine, E. Migneco, P. Piattelli, D. Santonocito, P. Sapienza, M. Bruno, M. D'Agostino, M.L. Fiandri, G. Vannini, N. Colonna, F. Gramegna, P.F. Mastinu, I. Iori, A. Moroni, G.V. Margagliotti, P.M. Milazzo, and R. Rui

Subjects
Physics, Nuclear and High Energy Physics, Spinodal, Photon, Component (thermodynamics), Spinodal decomposition, Astrophysics::High Energy Astrophysical Phenomena, IMPACT PARAMETER DEPENDENCE, Fermi energy, Astrophysics::Cosmology and Extragalactic Astrophysics, HEAVY-ION COLLISIONS, Signal, HARD PHOTON PRODUCTION, Thermal, Atomic physics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

Using thermal photons to tag the reaction time a prompt IMF emission component has been identified in central 58 Ni + 197 Au collisions at 45 MeV/amu. The comparison with theoretical calculations supports the hypothesis of dynamical emission in the spinodal region.

Published
2005

15. Present status and future programs of the n_TOF experiment

Author

S. Valenta, Marco Calviani, F. Cerutti, M. P. W. Chin, M. Krtička, F. Calviño, F. Roman, Srinivasan Ganesan, T. Martinez, F. Gramegna, M. B. Gómez-Hornillos, Alberto Mengoni, F. Beĉvář, M. Fernandez-Ordonez, Manuel Lozano, A. Manousos, Javier Praena, J. Marganiec, S. Andriamonje, R. Versaci, Mario Barbagallo, M. Brugger, C. Carrapiço, A. Riego, Matthias Heil, G. Tagliente, G. Cortes, E. Chiaveri, M. A. Cortés-Giraldo, P. F. Mastinu, R. Vlastou, M. Kokkoris, J. Andrzejewski, M. Mirea, C. Eleftheriadis, J. Billowes, D. Tarrío, Jeri Kroll, I. Duran, Thomas Rauscher, Carlo Rubbia, C. Lederer, R. Sarmento, D. Karadimos, M. Mastromarco, E. González-Romero, Carlos Guerrero, F. Avrigeanu, V. Variale, H. Leeb, M. Meaze, V. Vlachoudis, I. F. Gonçalves, D. Cano-Ott, J. L. Tain, Anton Wallner, P. Vaz, M. J. Vermeulen, M. Diakaki, Rene Reifarth, J. Perkowski, T. J. Wright, Fabio Belloni, T. Ware, F. Käppeler, Alberto Ventura, Yacine Kadi, K. Fraval, F. Gunsing, E. Griesmayer, D. G. Jenkins, E. Berthoumieux, J. M. Quesada, Cristian Massimi, A. Pavlik, L. Tassan-Got, C. Domingo-Pardo, C. Paradela, V. Boccone, L. Audouin, G. Vannini, Iris Dillmann, G. Giubrone, Roberto Losito, A. Tsinganis, Nicola Colonna, L.S. Leong, V. Bécares, E. Jericha, C. Weiß, E. Mendoza, P. M. Milazzo, N. Dzysiuk, Alfredo Ferrari, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, E. Chiaveri, M. Calviani, V. Vlachoudi, C. Wei, S. Andriamonje, J. Andrzejewski, L. Audouin, F. Avrigeanu, M. Barbagallo, V. Bécare, F. Beĉvář, F. Belloni, E. Berthoumieux, J. Billowe, V. Boccone, M. Brugger, F. Calviño, D. Cano-Ott, C. Carrapiço, F. Cerutti, M. Chin, N. Colonna, G. Corté, M.A. Cortés-Giraldo, M. Diakaki, I. Dillmann, C. Domingo-Pardo, I. Duran, N. Dzysiuk, C. Eleftheriadi, M. Fernández-Ordóñez, A. Ferrari, K. Fraval, S. Ganesan, G. Giubrone, M.B. Gómez-Hornillo, I.F. Gonçalve, E. González-Romero, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, M. Heil, D.G. Jenkin, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, M. Kokkori, M. Krtička, J. Kroll, C. Lederer, H. Leeb, L.S. Leong, R. Losito, M. Lozano, A. Manouso, J. Marganiec, T. Martinez, C. Massimi, P.F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P.M. Milazzo, M. Mirea, C. Paradela, A. Pavlik, J. Perkowski, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, C. Rubbia, R. Sarmento, G. Tagliente, J.L. Tain, D. Tarrio, L. Tassan-Got, A. Tsingani, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, R. Versaci, R. Vlastou, A. Wallner, T. Ware, and T.J. Wright

Subjects
Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Astrofísica nuclear, Information retrieval, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, CERN - n_TOF, Nuclear Theory, Creative commons, NEUTRON TIME OF FLIGHT, Nuclear physics, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Physics::Accelerator Physics, Nuclear astrophysics, Nuclear Experiment, License
Abstract

The neutron time-of-flight facility n_TOF at CERN, Switzerland, operational since 2001, delivers neutrons using the Proton Synchrotron (PS) 20 GeV/c proton beam impinging on a lead spallation target. The facility combines a very high instantaneous neutron flux, an excellent time of flight resolution due to the distance between the experimental area and the production target (185 meters), a low intrinsic background and a wide range of neutron energies, from thermal to GeV neutrons. These characteristics provide a unique possibility to perform neutron-induced capture and fission cross-section measurements for applications in nuclear astrophysics and in nuclear reactor technology. The most relevant measurements performed up to now and foreseen for the future will be presented in this contribution. The overall efficiency of the experimental program and the range of possible measurements achievable with the construction of a second experimental area (EAR-2), vertically located 20 m on top of the n_TOF spallation target, might offer a substantial improvement in measurement sensitivities. A feasibility study of the possible realisation of the installation extension will be also presented.

Published
2012

16. The n_TOF Collaboration, Neutron measurements for advanced nuclear systems: The n_TOF project at CERN

Author

N. Colonna, S. Andriamonje, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécares, F. Bečvář, F. Belloni, B. Berthier, E. Berthoumieux, M. Brugger, M. Calviani, F. Calviño, D. Cano Ott, C. Carrapiço, P. Cennini, F. Cerutti, E. Chiaveri, M. Chin, G. Cortés, M. A. Cortés Giraldo, M. Diakaki, I. Dillmann, C. Domingo Pardo, I. Duran, M. Fernández Ordóñez, A. Ferrari, K. Fraval, S. Ganesan, I. Giomataris, G. Giubrone, M. B. Gómez Hornillos, I. F. Gonçalves, E. González Romero, F. Gramegna, C. Guerrero, F. Gunsing, S. Harrisopulos, M. Heil, K. Ioannides, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, M. Krtička, E. Lebbos, C. Lederer, H. Leeb, R. Losito, M. Lozano, J. Marganiec, S. Marrone, T. Martinez, P. F. Mastinu, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, M. Mosconi, R. Nolte, T. Papaevangelou, C. Paradela, A. Pavlik, J. Perkowski, R. Plag, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, F. Roman, C. Rubbia, R. Sarmento, G. Tagliente, J. L. Tain, D. Tarrìo, L. Tassan Got, L. Tlustos, A. Tsinganis, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, Z. Vykydal, A. Wallner, C. Weiß, MASSIMI, CRISTIAN, VANNINI, GIANNI, N. Colonna, S. Andriamonje, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécare, F. Bečvář, F. Belloni, B. Berthier, E. Berthoumieux, M. Brugger, M. Calviani, F. Calviño, D. Cano-Ott, C. Carrapiço, P. Cennini, F. Cerutti, E. Chiaveri, M. Chin, G. Corté, M.A. Cortés-Giraldo, M. Diakaki, I. Dillmann, C. Domingo-Pardo, I. Duran, M. Fernández-Ordóñez, A. Ferrari, K. Fraval, S. Ganesan, I. Giomatari, G. Giubrone, M.B. Gómez-Hornillo, I.F. Gonçalve, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, S. Harrisopulo, M. Heil, K. Ioannide, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, M. Krtička, E. Lebbo, C. Lederer, H. Leeb, R. Losito, M. Lozano, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P.F. Mastinu, M. Meaze, E. Mendoza, A. Mengoni, P.M. Milazzo, M. Mosconi, R. Nolte, T. Papaevangelou, C. Paradela, A. Pavlik, J. Perkowski, R. Plag, A. Plompen, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, F. Roman, C. Rubbia, R. Sarmento, G. Tagliente, J.L. Tain, D. Tarrìo, L. Tassan-Got, L. Tlusto, A. Tsingani, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudi, R. Vlastou, Z. Vykydal, A. Wallner, and C. Weiß

Subjects
Nuclear Theory, Physics::Accelerator Physics, Nuclear Experiment, NEUTRON TIME OF FLIGHT, NEUTRON INDUCED REACTIONS, EMERGING NUCLEAR TECHNOLOGIES
Abstract

A few years ago, the neutron time-of-flight facility n_TOF was built at CERN to address some of the urgent needs of high-accuracy nuclear data for Accelerator Driven Systems and other advanced nuclear energy systems, as well as for nuclear astrophysics and fundamental nuclear physics. Thanks to the characteristics of the neutron beam, and to state-of-the-art detection and acquisition systems, high quality neutron cross-section data have been obtained for a variety of isotopes, many of which radioactive. Following an important upgrade of the spallation target and of the experimental area, a new measurement campaign has started last year. After a brief review of the most important results obtained so far at n_TOF, the new features of the facility are presented, together with the first results on the commissioning of the neutron beam. The plans for future measurements, in particular related to nuclear technology are finally discussed.

Published
2011

17. Neutron physics of the Re/Os clock. I. Measurements of the (n,gamma) cross sections of the 186,187,188-Os at the CERN n_TOF facility

Author

M. MOSCONI, K. FUJII, A. MENGONI, C. DOMINGO PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA MARQUES, L. FITZPATRICK, H. FRAIS KOELBL, W. FURMAN, R. GALLINO, I. GONCALVES, E. GONZALEZ ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, P. MASTINU, E. MENDOZA, P. M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M. T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J. L. TAIN, L. TASSAN GOT, L. TAVORA, R. TERLIZZI, P. VAZ, A. VENTURA, D. VILLAMARIN, M. C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, K. WISSHAK, MASSIMI, CRISTIAN, VANNINI, GIANNI, M. MOSCONI, K. FUJII, A. MENGONI, C. DOMINGO-PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ-VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO-OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA-MARQUES, L. FITZPATRICK, H. FRAIS-KOELBL, W. FURMAN, R.GALLINO, I. GONCALVES, E. GONZALEZ-ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA-MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, C. MASSIMI, P. MASTINU, E. MENDOZA, P.M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M.T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J.L. TAIN, L. TASSAN-GOT, L. TAVORA, R. TERLIZZI, VANNINI G., P. VAZ, A. VENTURA, D. VILLAMARIN, M.C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, and K. WISSHAK

Subjects
AGE OF THE UNIVERSE, NEUTRON CAPTURE CROSS SECTIONS, NEUTRON PHYSICS, COSMOCHRONOMETER
Abstract

The precise determination of the neutron capture cross sections of Os186 and Os187 is important to define the s-process abundance of Os187 at the formation of the solar system. This quantity can be used to evaluate the radiogenic component of the abundance of Os187 due to the decay of the unstable Re187 (t1/2=41.2 Gyr) and from this to infer the time duration of the nucleosynthesis in our galaxy (Re/Os cosmochronometer). The neutron capture cross sections of Os186, Os187, and Os188 have been measured at the CERN n-TOF facility from 1 eV to 1 MeV, covering the entire energy range of astrophysical interest. The measurement has been performed by time-of-flight technique using isotopically enriched samples and two C6D6 scintillation detectors for recording the prompt γ rays emitted in the capture events. Maxwellian averaged capture cross sections have been determined for thermal energies between kT=5 and 100 keV corresponding to all possible s-process scenarios. The estimated uncertainties for the values at 30 keV are 4.1, 3.3, and 4.7% for Os186, Os187, and Os188, respectively. © 2010 The American Physical Society

Published
2010

18. Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections of 186,187,188Os

Author

K. FUJII, M. MOSCONI, A. MENGONI, C. DOMINGO PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA MARQUES, L. FITZPATRICK, H. FRAIS KOELBL, W. FURMAN, R. GALLINO, I. GONCALVES, E. GONZALEZ ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, P. MASTINU, E. MENDOZA, P. M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M. T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J. L. TAIN, L. TASSAN GOT, L. TAVORA, R. TERLIZZI, P. VAZ, A. VENTURA, D. VILLAMARIN, M. C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, K. WISSHAK, MASSIMI, CRISTIAN, VANNINI, GIANNI, K. FUJII, M. MOSCONI, A. MENGONI, C. DOMINGO-PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ-VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO-OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA-MARQUES, L. FITZPATRICK, H. FRAIS-KOELBL, W. FURMAN, R.GALLINO, I. GONCALVES, E. GONZALEZ-ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA-MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, C. MASSIMI, P. MASTINU, E. MENDOZA, P.M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M.T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J.L. TAIN, L. TASSAN-GOT, L. TAVORA, R. TERLIZZI, VANNINI G., P. VAZ, A. VENTURA, D. VILLAMARIN, M.C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, and K. WISSHAK

Subjects
STELLAR NUCLEOSYNTHESIS, NEUTRON RESONANCE ANALYSES, R-MATRIX ANALYSIS, NEUTRON CAPTURE REACTIONS, TIME DURATION OF GALACTIC NUCLEOSYNTHESIS
Abstract

Neutron resonance analyses have been performed for the capture cross sections of 186Os, 187Os, and 188Os measured at the n_TOF facility at cern. Resonance parameters have been extracted up to 5, 3, and 8 keV, respectively, using the sammy code for a full R-matrix fit of the capture yields. From these results average resonance parameters were derived by a statistical analysis to provide a comprehensive experimental basis for modeling of the stellar neutron capture rates of these isotopes in terms of the Hauser-Feshbach statistical model. Consistent calculations for the capture and inelastic reaction channels are crucial for the evaluation of stellar enhancement factors to correct the Maxwellian averaged cross sections obtained from experimental data for the effect of thermally populated excited states. These factors have been calculated for the full temperature range of current scenarios of s-process nucleosynthesis using the combined information of the experimental data in the region of resolved resonances and in the continuum. The consequences of this analysis for the s-process component of the 187Os abundance and the related impact on the evaluation of the time duration of galactic nucleosynthesis via the Re/Os cosmochronometer are discussed.

Published
2010

19. High-accuracy U233(n,f) cross-section measurement at the white-neutron source n_TOF from near-thermal to 1 MeV neutron energy

Author

M. Calviani, J. Praena, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimos, M. Kerveno, P. Koehler, E. Kossionides, M. Krticka, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, P. Mastinu, E. Mendoza, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vicente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, M. Calviani, J. Praena, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimo, M. Kerveno, P. Koehler, E. Kossionide, M. Krticka, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, E. Mendoza, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M.T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
NETRON INDUCED REACTIONS, Nuclear Experiment, NUCLEAR FISSION
Abstract

The U233(n,f) cross section has been measured at the white neutron source n-TOF in a wide energy range with a dedicated fission ionization chamber. We report here the results from ∼30 meV to 1 MeV neutron energy. The U233(n,f) cross section has been determined relative to a reference sample of U235(n,f) measured simultaneously with the same detector. The very high instantaneous neutron flux and the intrinsically low background of the n-TOF installation result in an accuracy around 3% in the whole energy range, while the energy resolution of the neutron beam allows for an accurate description of the fission cross section by means of R-matrix analysis over a wide energy range. The results are, in general, in good agreement with the most recent high-accuracy measurement of this fission cross section, over the more limited range of the previous measurements, and indicated that even the latest evaluations underestimate the cross section in the epithermal region. The present high-quality data provide the basis for a more precise evaluation of the U233 fission cross section and for improving the reliability of databases needed for the design of new energy systems based on the Th/U cycle. © 2009 The American Physical Society

Published
2009

20. The n_TOF Total Absorption Calorimeter for neutron capture measurements at CERN

Author

F. Gunsing, Cristian Massimi, S. David, G. Tagliente, R. C. Haight, J. Salgado, A. Poch, L. Tavora, A. J. M. Plompen, Rene Reifarth, S. Walter, P. M. Milazzo, L. Audouin, G. Vannini, A. Herrera-Martinez, C. Paradela, S. Lukic, A. Pavlik, G. Rudolf, I. Lopes, Michael Wiescher, F. Käppeler, C. T. Papadopoulos, P. Pavlopoulos, C. Domingo-Pardo, J. Marganiec, S. Andriamonje, P. Rullhusen, P. E. Koehler, D. Villamarin, Ralf Plag, Michael Heil, J. M. Quesada, Marco T. Pigni, I. Savvidis, J. Andrzejewski, N. Patronis, P. Cennini, Carlo Rubbia, B. Haas, P. F. Mastinu, V. Vlachoudis, F. Alvarez-Velarde, F. Gramegna, Iris Dillmann, S. Marrone, G. Cortes, C. Santos, M. Mosconi, C. Carrapiço, C. Stephan, S. O'Brien, Manuel Lozano, F. Bečvář, W. Dridi, R. Terlizzi, E. Mendoza, F. Voss, C. Eleftheriadis, C. Lampoudis, E. Berthoumieux, T. Martinez, Roberto Capote, Yacine Kadi, P.A. Assimakopoulos, H. Álvarez, Nicola Colonna, M. Krtička, F. Neves, E. Jericha, F. Calviño, J. L. Tain, Carlos Guerrero, Alfredo Ferrari, M. Dahlfors, R. Ferreira-Marques, U. Abbondanno, P. Vaz, Heinz Oberhummer, M. Kerveno, Alberto Ventura, Aaron Couture, E. Gonzalez-Romero, W.I. Furman, A. Plukis, Alberto Mengoni, J. Pancin, J. Cox, E. Chiaveri, D. Cano-Ott, Laurent Tassan-Got, A. Lindote, C. A. Papachristodoulou, L. Ferrant, M. C. Vicente, G. Aerts, K. Wisshak, C. Pretel, H. Leeb, K. Fujii, E. Kossionides, Javier Praena, I. Goncalves, Thomas Rauscher, D. Karadimos, L. Sarchiapone, R. Vlastou, Marco Calviani, V. Chepel, Masayuki Igashira, I. Duran, P. Baumann, L. Perrot, C. Moreau, Gerald Badurek, C. Guerrero, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, F. Gramegna, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimo, M. Kerveno, P. Koehler, E. Kossionide, M. Krticka, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, E. Mendoza, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M.T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, K. Wisshak, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), Pôle Universitaire Léonard de Vinci (PôLE UNIVERSITAIRE LéONARD DE VINCI), Pôle Universitaire Léonard de Vinci (PULV), and nTOF

Subjects
Nuclear and High Energy Physics, Nuclear transmutation, Physics::Instrumentation and Detectors, GAMMA RAY CALORIMETER, neutron cross-sections, Total Absorption, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], time-of-flight, 7. Clean energy, 01 natural sciences, Nuclear physics, Stellar nucleosynthesis, Nucleosynthesis, 0103 physical sciences, Neutron, n_TOF, 010306 general physics, Absorption (electromagnetic radiation), total absorption, Nuclear Experiment, Instrumentation, isotopes, cross-section measurements, Physics, Time-of-Flight, detector, 010308 nuclear & particles physics, baf2 detector, transmutation, BaF2 detector, Calorimeter, Time of flight, Neutron capture, stomatognathic diseases, n_tof, beam, of-flight facility, NEUTRON CAPTURE, neutron capture, Neutron cross-sections
Abstract

The n_TOF Collaboration has built and commissioned a high-performance detector for (n, gamma) measurements called the Total Absorption Calorimeter (TAC). The TAC was especially designed for measuring neutron capture cross-sections of low-mass and/or radioactive samples with the accuracy required for nuclear technology and stellar nucleosynthesis. We present a detailed description of the TAC and discuss its overall performance in terms of energy and time resolution, background discrimination, detection efficiency and neutron sensitivity. (C) 2009 Elsevier B.V. All rights reserved. Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment

Published
2009

21. Neutron capture cross section of 90-Zr: Bottleneck in the s-process reaction flow

Author

G. Tagliente, K. Fujii, P. M. Milazzo, C. Moreau, G. Aerts, U. Abbondanno, F. Alvarez Velarde, H. Alvarez Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfors, S. David, R. Dolfini, C. Domingo Pardo, I. Duran, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferrera Marques, H. Frais Koelbl, W. Furman, I. Goncalves, R. Gallino, E. Gonzalez Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimos, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez Val, P. Mastinu, A. Mengoni, A. Molina Coballes, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulos, J. M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Plukis, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, I. C. Soares, C. Stephan, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, F. Voss, H. Wendler, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, G. Tagliente, K. Fujii, P.M. Milazzo, C. Moreau, G. Aert, U. Abbondanno, F. Alvarez-Velarde, H. Alvarez-Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfor, S. David, R. Dolfini, C. Domingo-Pardo, I. Duran, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferrera-Marque, H. Frais-Koelbl, W. Furman, I. Goncalve, R. Gallino, E. Gonzalez-Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez-Val, C. Massimi, P. Mastinu, A. Mengoni, A. Molina-Coballe, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulo, J.M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, I.C. Soare, C. Stephan, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, and K. Wisshak.

Subjects
NUCLEAR ASTROPHYSICS, NUCLEAR PHYSICS, NEUTRON CAPTURE REACTIONS
Published
2008

22. Neutron capture cross section measurements for nuclear astrophyisics at CERN n_TOF

Author

P. Cennini, W. Rapp, E. Griesmayer, J. Marganiec, G. Cortes, J. Salgado, V. Chepel, A. Poch, R. C. Haight, J. Andrzejewski, M. Mosconi, Carlo Rubbia, F. Gunsing, S. Andriamonje, C. Lamboudis, J. L. Tain, M. C. Vincente, V. Vlachoudis, A. Pavlik, M. Rosetti, C. Domingo-Pardo, I. Duran, C. Stephan, S. O'Brien, P. Baumann, Alfredo Ferrari, R. Ferreira-Marques, J. Cox, P. F. Mastinu, G. Aerts, Laurent Tassan-Got, J.C. Soares, C. Paradela, Michael Wiescher, H Frais-Kölbl, Marco Pignatari, R. Terlizzi, V. Konovalov, R. Gallino, D. Villamarin, I. Goncalves, M. Dahlfors, Roberto Capote, L. Ferrant, L. Tavora, S. Lukic, L. Perrot, P. Vaz, Alberto Ventura, Aaron Couture, Thomas Rauscher, F. Neves, P. Rullhusen, J. Pancin, S. Isaev, E. Chiaveri, D. Cano-Ott, U. Abbondanno, Rene Reifarth, G. Vannini, Michael Heil, M. Krtička, F. Calviño, T. Papaevangelou, D. Karadimos, P. M. Milazzo, C. Moreau, K. Wisshak, S. David, A.J.P.L. Policarpo, G. Tagliente, P. Pavlopoulos, Saed Dababneh, M. Embid-Segura, Yacine Kadi, J. M. Quesada, E. Jericha, A. Herrera-Martinez, P. E. Koehler, D. Cortina, Manuel Lozano, F. Voss, F. Käppeler, F. Becvar, G. Lorusso, E. Berthoumieux, Alberto Mengoni, B. Haas, E. Gonzalez-Romero, Nicola Colonna, C. Pretel, H. Alvarez-Pol, A. Plukis, V. Ketlerov, F. Gramegna, H. Wendler, Ralf Plag, J. Benlliure, A. Molina-Coballes, H. Leeb, A. J. M. Plompen, G. Rudolf, I. Lopes, W.I. Furman, A. Lindote, M. Kerveno, José M. Martínez-Val, José Manuel Perlado, Heinz Oberhummer, S. Marrone, A. Goverdovski, F. Alvarez-Velarde, Gerald Badurek, R. Dolfini, U. Abbondanno, G. Aert, F. Alvarez-Velarde, H. Alvarez-Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfor, S. David, R. Dolfini, C. Domingo-Pardo, I. Duran, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, H. Frais-Koelbl, W. Furman, I. Goncalve, R. Gallino, E. Gonzalez-Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez-Val, P. Mastinu, A. Mengoni, P.M. Milazzo, A. Molina-Coballe, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulo, J.M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, J.C. Soare, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, K. Wisshak, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), L. Buchmann, M. Comyn, J. Thomson, and nTOF

Subjects
Nuclear and High Energy Physics, Astrofísica nuclear, Neutron cross sections, Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutrons -- Seccions, Nuclear physics, Cross section (physics), Neutron flux, 0103 physical sciences, Neutron cross section, Nuclear astrophysics, Spallation, Neutron, 010306 general physics, Nuclear Experiment, Physics, Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Radioactivity, Physics::Accelerator Physics, Física nuclear
Abstract

A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n_TOF, the neutron spallation source operating at CERN. The low repetition frequency of the proton beam driver, the extremely high instantaneous neutron flux, and the low background conditions in the experimental area are optimal for capture cross section measurements on low-mass or radioactive samples. An overview of the measurements performed during the two experimental campaigns in 2002 and 2003 is presented with special emphasis on the measurement of the capture cross sections of the Os isotopes relevant for the cosmochronology based on the Re/Os clock. http://www.sciencedirect.com/science/article/B6TVB-4GFTP27-40/1/e75becb4002b5a2d671901c2aa851543

Published
2005

23. Measurement of the 151Sm n,gamma 152Sm cross section at n_TOF

Author

Roberto Capote, V. Chepel, S. David, P. Baumann, G. Vannini, G. Tagliente, Enrico Chiaveri, M. Rosetti, W. Rapp, M. Krtička, F. Calviño, S. Lukic, Corrie S. Moreau, L. Perrot, P. Pavlopoulos, L. Tavora, José M. Martínez-Val, J. Salgado, A. Poch, Saed Dababneh, F. Gramegna, R. Flag, José Manuel Perlado, P. Rullhusen, G. Aerts, R. Gallino, V. Ketlerov, A. Lindote, Heinz Oberhummer, L. Ferrant, J. Marganiec, S. Andriamonje, C. Pretel, P. Cennini, E. Gonzalez-Romero, A. Goverdovski, Michael Heil, J. Andrzejewski, F. Neves, P. M. Milazzo, J. Benlliure, A. J. M. Plompen, P. F. Mastinu, S. Isaev, M. Embid-Segura, Gerald Badurek, R. C. Haight, R. Dolfini, M. Mosconi, Marco Pignatari, U. Abbondanno, G. Rudolf, I. Lopes, E. Jericha, F. Voss, C. Stephan, S. O'Brien, C. Paradela, W.I. Furman, D. Villamarin, A. Herrera-Martinez, Thomas Rauscher, D. Cortina, Manuel Lozano, F. Alvarez-Velarde, Arnaud Ferrari, Nicola Colonna, R. Terlizzi, James L. Cox, V. Konovalov, Vasilis Vlachoudis, H. Alvarez-Pol, Michael Wiescher, E. Berthoumieux, D. Karadimos, P. E. Koehler, Rene Reifarth, Alberto Mengoni, Daniel Cano-Ott, A.J.P.L. Policarpo, Subramanian Raman, A. Molina-Coballes, A. Plukis, J. M. Quesada, L. Tassan-Got, T. Papaevangelou, B. Haas, J.C. Scares, I. Duran, A. Ventura, Y. Kadi, H. Frais-Koelbl, R. Ferreira-Marques, E. Griesmayer, C. Rubbia, Isabel S. Gonçalves, S. Marrone, M.C. Vincente, C. Lamboudis, J. L. Tain, M. Kerveno, F. Bečvář, M. Dahlfors, P. Vaz, Aaron Couture, A. Pavlik, C. Domingo-Pardo, J. Pancin, F. Käppeler, F. Gunsing, H. Leeb, K. Wisshak, H. Wendler, G. Cortes, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), L. Buchmann, M. Comyn, J. Thomson, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, S. Marrone, U. Abbondanno, G. Aert, F. Alvarez-Velarde, H. Alvarez-Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Bennliure, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfor, S. David, R. Dolfini, C. Domingo-Pardo, I. Duran, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, H. Frais-Koelbl, W. Furman, I. Goncalve, R. Gallino, E. Gonzalez-Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudi, H. Leeb. A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, J. Martinez-Val, P. Mastinu, A. Mengoni, P.M. Milazzo, A. Molina-Coballe, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulo, J.M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, A. Policarpo, C. Pretel, J. Quesada, S. Raman, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, J.C. Soare, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, and K. Wisshak

Subjects
Physics, Nuclear reaction, Neutrons, Nuclear and High Energy Physics, Física [Àrees temàtiques de la UPC], Branching fraction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Giant star, 01 natural sciences, Neutrons--Capture, Nuclear physics, Stars, Nucleosynthesis, 0103 physical sciences, Asymptotic giant branch, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, s-process, Nuclear Experiment, 010303 astronomy & astrophysics, Dimensionless quantity
Abstract

The 151 Sm(n, γ ) 152 Sm cross section, which is important for the interpretation of the 151 Sm branching as an s -process thermometer, was measured from 1 eV up to 1 MeV at the innovative n_TOF facility at CERN. Based on these data, the Maxwellian-averaged cross section at k T = 30 keV is found to be 3100±160 mb. This value can be used to constrain the thermodynamical conditions in Asymptotic Giant Branch (AGB) stars during He-shell burning.

Published
2005

24. Measurements of the 90,91,92,94,96 Zr n, gamma cross-sections at n_TOF

Author

G. Cortes, Roberto Capote, P. Cennini, A. J. M. Plompen, G. Rudolf, I. Lopes, C. Pretel, G. Vannini, M. Mosconi, P. Pavlopoulos, A. Pavlik, James L. Cox, C. Stephan, S. O'Brien, C. Domingo-Pardo, S. David, R. Gallino, R. Terlizzi, G. Tagliente, F. Voss, J. Andrzejewski, Michael Heil, F. Käppeler, E. Griesmayer, V. Ketlerov, A. Molina-Coballes, L. Ferrant, L. Tavora, W. Rapp, Rene Reifarth, José M. Martínez-Val, J. Pancin, G. Aerts, J. Salgado, M. C. Vincente, A. Poch, A. Herrera-Martinez, Arnaud Ferrari, Nicola Colonna, P. Rullhusen, Corrie S. Moreau, L. Perrot, Alberto Mengoni, J.C. Soares, I. Duran, José Manuel Perlado, Heinz Oberhummer, Thomas Rauscher, Vasilis Vlachoudis, H. Alvarez-Pol, M. Dahlfors, J. M. Quesada, V. Chepel, L. Tassan-Got, V. Konovalov, Y. Kadi, D. Karadimos, P. Baumann, H. Frais-Koelbl, S. Isaev, U. Abbondanno, D. Cano-Ott, W.I. Furman, A.J.P.L. Policarpo, P. Vaz, Aaron Couture, S. Lukic, G. Lorusso, B. Haas, E. Gonzalez-Romero, E. Berthoumieux, P. E. Koehler, Enrico Chiaveri, M. Rosetti, Ralf Plag, J. Benlliure, F. Gramegna, A. Plukis, C. Lamboudis, J. L. Tain, R. C. Haight, M. Kerveno, C. Paradela, M. Krtička, A. Ventura, Saed Dababneh, Michael Wiescher, J. Marganiec, S. Andriamonje, D. Villamarin, P. F. Mastinu, Marco Pignatari, M. Embid-Segura, D. Cortina, Manuel Lozano, C. Rubbia, Isabel S. Gonçalves, S. Marrone, E. Jericha, K. Wisshak, H. Wendler, F. Gunsing, F. Neves, F. Calviño, H. Leeb, P. M. Milazzo, R. Ferreira-Marques, T. Papaevangelou, F. Bečvář, A. Lindote, A. Goverdovski, F. Alvarez-Velarde, Gerald Badurek, R. Dolfini, L. Buchmann, M. Comyn, J. Thomson, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), nTOF, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, G. Tagliente, U. Abbondanno, G. Aert, F. Alvarez-Velarde, H. Alvarez-Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfor, S. David, R. Dolfini, C. Domingo-Pardo, I. Duran, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferrera-Marque, H. Frais-Koelbl, W. Furman, I. Goncalve, R. Gallino, E. Gonzalez-Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez-Val, P. Mastinu, A. Mengoni, P.M. Milazzo, A. Molina-Coballe, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulo, J.M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, I.C. Soare, C. Stephan, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, and K. Wisshak

Subjects
Nuclear and High Energy Physics, Neutron cross sections, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Neutron scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Neutrons -- Seccions, Neutron time-of-flight scattering, Nuclear physics, 0103 physical sciences, Neutron cross section, Neutrons -- Mesurament, Neutron, 010306 general physics, Nuclear Experiment, Physics, Bonner sphere, 010308 nuclear & particles physics, Neutrons--Measurement, Neutron stimulated emission computed tomography, Neutron temperature, Neutron capture, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Physics::Accelerator Physics
Abstract

Neutron capture cross sections of the 90,91,92,94,96Zr have been measured over the energy range from 1 eV to 1 MeV at the spallation neutron facility n TOF at CERN in 2003. The innovative features of the neutron beam, in particular the high instantaneous flux, the high energy resolution and low background, together with improvements of the neutron sensitivity of the capture detectors make this facility unique for neutron-induced reaction cross section measurements with much improved accuracy. The preliminary results of the Zr measurements show capture resonance strengths generally smaller than in previous measurements.

Published
2005

25. Measurements of high-energy neutron-induced fission ofnatPb and209Bi

Author

H. Álvarez, J. L. Tain, D. Cano-Ott, P. E. Koehler, Marco T. Pigni, Rene Reifarth, P. Pavlopoulos, I. Dillmann, J. M. Quesada, Masayuki Igashira, M. Kerveno, Christoph A. Stephan, G. Cortes, S. Lukic, G. Aerts, D. Tarrío, Corrie S. Moreau, S. Isaev, U. Abbondanno, F. Gunsig, Ralf Plag, Roberto Capote, A. Plukis, P.A. Assimakopoulos, F. Alvarez-Velarde, Gerald Badurek, G. Vannini, G. Tagliente, A. Ventura, C. Eleftheriadis, A. Herrera-Martinez, N. Patronis, W.I. Furman, C. Rubbia, S. Walter, A. Lindote, Arnaud Ferrari, M. C. Vicente, Thomas Rauscher, A. J. M. Plompen, R. Vlastou, L. Perrot, J. Marganiec, Alberto Mengoni, C. A. Papachristodoulou, E. Berthoumieux, S. Andriamonje, I. Lopes, L. Sarchiapone, D. Karadimos, E. Chiaveri, P. F. Mastinu, I. Savvidis, James L. Cox, L. Tassan-Got, Carlos Guerrero, E. González-Romero, H. Leeb, Heinz Oberhummer, R. C. Haight, F. Becvar, C. Paradela, L. Audouin, M. Krtička, C. Le Naour, R. Ferreira-Marques, T. Martinez, D. Trubert, Michael Wiescher, F. Voss, Cristian Massimi, K. Wisshak, S. David, B. Berthier, Y. Kadi, Michael Heil, Marco Calviani, E. Kossionides, I. Duran, V. Chepel, M. Oshima, G. Rudolf, C. T. Papadopoulos, Javier Praena, L. Ferrant, J. Andrzejewski, V. Vlachoudis, F. Neves, P. M. Milazzo, P. Baumann, D. Villamarin, C. Pretel, E. Jericha, K. Fujii, C. Santos, M. Embid-Segura, Isabel S. Gonçalves, S. Marrone, Manuel Lozano, L. Tavora, P. Rullhusen, P. Cennini, M. Mosconi, S. O'Brien, Nicola Colonna, F. Gramegna, R. Terlizzi, F. Käppeler, J. Pancin, J. Salgado, A. Poch, M. Dahlfors, C. Carrapiço, P. Vaz, Aaron Couture, B. Haas, F. Calviño, W. Dridi, C. Lampoudis, A. Pavlik, C. Domingo-Pardo, D. Karamanis, D. Tarrío, L. Tassan-Got, L. Audouin, B. Berthier, I. Duran, L. Ferrant, S. Isaev, C. Le Naour, C. Paradela, C. Stephan, D. Trubert, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, C. Eleftheriadi, M. Embid-Segura, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Gonçalve, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsig, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krticka, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M.T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, G. Tagliente, J.L. Tain, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
High energy, Engineering, Fission, business.industry, Physics, QC1-999, Nuclear engineering, Nuclear Theory, Creative commons, Engineering physics, neutron time-of-flight facility, Neutron, Nuclear Experiment, business, License
Abstract

he CERN Neutron Time-Of-Flight (n_TOF) facility is well suited to measure low cross sections as those of neutron-induced fission in subactinides. The cross section ratios of (nat)Pb and (209)Bi relative to (235)U and (238)U were measured using PPAC detectors and a fragment coincidence method that allows us to identify the fission events. The present experiment provides first results for neutron-induced fission up to 1 GeV. Good agreement is found with previous experimental data below 200 MeV. The comparison with proton-induced fission indicates that the limiting regime where neutron-induced and proton-induced fission reach equal cross sections is close to 1 GeV.

Published
2010

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